Improvement in sectional steam-generators



2 Sheets-$heet 1.

M. n. CRANE! SECTIONAL STEAM-GENERATOR.

Patented Feb. 15, 1876.

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V '2 SheetsShe,et 2. M, H. CRANE.

SECTIONAL STEAM-GENERATOR. No.173,593. Eatented Feb -.15,1876

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a II' N. PETERS, PHOTO-UTHOGRAPHER, WASHINGTON. D.C.

UNITED STATES PATENT OFFICE.

MARTIN H. CRANE, OFOINOINNATI, OHIO, ASSIGNOR TO CRANE-BREED & (JO., OF SAME PLACE.

IMPROVEMENT IN SECTIONAL STEAM-GENERATORS.

Specification forming part-of Letters Patent No. 73,593, dated February 15, 1-876; application filed.

a December 23, 1875.

divided into two equal portions by a longitudinal partition or diaphragm. Partitions are also made in the head so as to form two distinct cells or compartments, namely, a receiving-cell for the feed-water, which communicates, by a series of. duets, with the contiguous compartments of each pair of tubes whose fellow compartments communicate with the other or delivering cell. By this -means the water is made to flow from the receiving-cell of the central chamber to the remote extremity of each tube and to return into the delivering-cell, and a prompt and efficient generator is secured within remarkably compact dimensions and at a very moderate outlay. The boiler being wholly composed of cylindrical tubes, is, of course, exempt from liability to dangerous explosion.

In the accompanying drawing, Figure l is an axial section at the line .r'x. Fig. 2'is a horizontal section-at-the line y 3 Fig.3 is an enlarged horizontal section at the line Z Z.

Figs. 4 and 5 are vertical sectionsat the line X X and Y Y, respectively. a

My boiler contains any desirable number of central heads or chambers, A A A A, united in a vertical hollow column or stack. Each head is so partitioned interiorlyas to form two distinct cells, namely, a receivingcell, G, and a delivering cell, D. The receiving-cell U is annular and receives the feedpipe B, and opens upward into a series of ducts, E, that communicate with the contiguous halves a a of each alternate pairof tubes, F, whose other halves, b b, in turn communicate by ducts, G, with the delivering-cell D.

A result of this arrangement is, that the water which enters the cell 0 has no exit other than through one of the halves a or a, and consequently flows out to the end of the tube and thence backward along the half b or 1) before it can enter the cell D. In other words, the tubes which radiate from any given head are arranged in alternate pairs, each pair forming conduits for two outgoing streams from the lower cell (J, and two re-.

turning streams to the cell D.

Ahead, with its set of radiating tubes, such as above described, immersed in a suitable furnace, H, constitutes of itself a complete steam-generator; but in situations where a greater volume of steam is required, the capacity of thegenerator may be increased at will, by simply adding one or more of the above-described elements, which may be done by nipplecouplings-I. In a stack thus formed, the successive heads communicate by their cells D, while their cells 0 may (each or any number of them) receive feed-water direct by suitable connection, B, with a manifold, K, or dekmrwise. The lowest head is closed by a screw-plug, L. A stay-rod, M, which traverses the stack of heads, and a bridge, N, and nut, O, assist the nipples in holding all the component elements of the stack securely together. When several heads are thus united in a stack or column, they are preferably so arranged as to locate the tubes of one vertically over the intervals of those below. The steam-pipe P is either connected directly to the central compartment of the uppermost head, or to a steam-drun1,Q, which may be secured to the head'by a nipple in the same manner as the heads are coupled. H may represent any suitable inclosing-furnace.

I claim as new and my invention 1. The generator, composed of central head A, annular receiving-cell G, and delivering cell D, said receiving-cell having duets, E, communicating with contiguous halves, a a, of each alternate pair of tubes F, and said delivering-cell having ducts, G", communicating with the other contiguous halves, b b,

of the tubes, F the whole adapted to form a tion with the manifold K, having pipes B, as

complete generator, as and fonthje purpose set and forithe purpose set forth.

forth. I In testimony of which invention, I hereunto 2. A series of generators, consisting of set my hand.

central heads, A, having annular receiving- M. H. CRANE.

cells, C, and delivering-cells, 1), connected by ducts, E G, the partitioned and contignonsly-i connected tubes F and neck I, in co nbina- Attest WAL EK KN G150. H. KNIGHT. 

